Write an expression for each verbal expression 1. the sum of one-third of a number and 27
1 answer:
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Step 1. Simplify 
to 
Step 2. Simplify to 
Step 3. Simplify
to 
Step 4. Cancel
on both sides
Step 5. Multiply both sides by
(the LCM of 
)
Step 6. Expand
Step 7. Subtract
from both sides
Step 8. Simplify
to 
Step 9. Multiply both sides by
Done! :) Hope this helps! :)
Step 2. Simplify
Step 3. Simplify
Step 4. Cancel
Step 5. Multiply both sides by
Step 6. Expand
Step 7. Subtract
Step 8. Simplify
Step 9. Multiply both sides by
Done! :) Hope this helps! :)
Answer:
1. 600 watts
2. 35640 J
3. 55%
4. 20 J
5. The cost of running the fire is 8p.
Step-by-step explanation:
1. Energy = 36 000 J , t = 1 minute = 60 seconds
Power =
=
= 600 watts
2. Power =
⇒ work done = Power × time
= 99 × 360
= 35640 J
3. Efficiency = (Output / Input) × 100
= × 100
= 55%
4. Work done = Force × distance
= 5 × 4
= 20 J
5. Given that 1 KWh cost 2p, Power = 4 KW and time = 4 hours.
Power =
Energy = Power × time
= 4 × 4
= 16 KWh
The cost of running the fire =
= 8p